62 lines
1.3 KiB
Bash
Executable File
62 lines
1.3 KiB
Bash
Executable File
#!/bin/bash
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#
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# How to build a boot image
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# NOTE: This script cant run properly yet
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# Things described here should be done manually for now
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#
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# COPYRIGHT © Nigel Barink 2023
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#
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echo "Building a FAT16 filesystem"
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dd if=/dev/zero of=disk.img bs=512 count=131072
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fdisk disk.img
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# Use the following options in fdisk (Format Disk Tool)
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# We want to create a MBR (NOT GPT) Partition table containing 1 logical disk
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# with a primary FAT16 partition marked bootable
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#OPTIONs
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# Create new DOS disklabel
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# o
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# Create new partition
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# n
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# Choose Primary as partition type
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# p
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# hit enter to choose default for the other options
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# Mark partition 1 as bootable
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# a
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# Change partition type to FAT16
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# t
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# Choose Partition 1
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# 1
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# Choose HEX 6 for FAT16
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# 6
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# Sync and write changes to disk
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# w
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# Create a "block" device from the disk.img
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losetup /dev/loop9 disk.img
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# Format the partition on the disk as FAT16
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mkdosfs -F16 /dev/loop9
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# Mount the disk to a folder on our dev machine
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mount /dev/loop9 /mnt
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# Install the grub bootloader onto the disk
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grub-install --no-floppy --modules="normal multiboot" /dev/loop9 --target=i386-pc --boot-directory=/mnt/boot --force
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# copy the necessary OS files
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cp root/boot/myos.bin /mnt/boot/myos.bin
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cp root/boot/grub/grub.cfg /mnt/boot/grub/grub.cfg
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# Unmount the device
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umount /mnt
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# Destroy the loop device
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losetup -d /dev/loop9
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